congressman peter king of new york says he believes this gap is one of the reasons why the f-b-i's interview with tamerlan tsarnaev in 2011 didn't raise red flags, even though russia had expressed concerns about his radical views. >> "if russians had given the fbi early on the information they had, it would have been a lot different investigation." >> reporter: as more details emerge on "who knew what" about the tsarnaev brothers, ranking democrat on the house homeland security committee urges patience. >> "at this point, trying to point fingers saying the dots weren't connected, is a little bit early. let's get in, let's review it. and at some point, if there are some things we need to change, let's change them." >> reporter: while authorities piece together the case. in solidarity with the boston victims." the running community is showing support for the victims. two marathons. in madrid, spain.where nearly 200 were killed by terrorist bombs nearly a decade ago. runners and spectators observed a minute of silence to remember boston before the race start. and in oklahoma city, the site of a